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* Xml - lua - context
@ 2022-03-28 13:32 Thomas A. Schmitz via ntg-context
  0 siblings, 0 replies; 4+ messages in thread
From: Thomas A. Schmitz via ntg-context @ 2022-03-28 13:32 UTC (permalink / raw)
  To: mailing list for ConTeXt users; +Cc: Thomas A. Schmitz

Dear all,

For a small project, I have two questions (without MWE…) on processing xml via Lua and context. I’ll write two messages so eager volunteers can reply more easily!

So question one: given an xml structure like this

  <section>
    <sectiontitle>
      Introduction: the <em>Iliad</em>
    </sectiontitle>
    <sectionlist>
      Introduction: the <em>Iliad</em>
    </sectionlist>
  </section>

I want to typeset the section title with some added information. Since I’m processing in a loop, I thought this would be easier in Lua, so I have something like this:

local i = 0

local sessions = { “April 2”, “April 9”, “April 16” } -- etc.

function xml.functions.section(t)
	i = i + 1
	local raw_section = xml.text (t, "/sectiontitle")
	local section_head = i .. ". session, " .. sessions [i] .. ": " .. raw_section
	context.startsection { title=section_head }
	lxml.flush (t)
	context.stopsection ()
end

However, this means that the section_head is serialized as a string and not processed according to the xml setups, so I have “the <em>Iliad</em>” in my typeset document. How can this be avoided? How can I have the <em>...</em> processed instead of serialized in the section title? 

Thanks for looking at my code!

Thomas
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^ permalink raw reply	[flat|nested] 4+ messages in thread
* Xml - Lua - context
@ 2022-03-28 13:40 Thomas A. Schmitz via ntg-context
  2022-03-28 16:21 ` Adam Reviczky via ntg-context
  0 siblings, 1 reply; 4+ messages in thread
From: Thomas A. Schmitz via ntg-context @ 2022-03-28 13:40 UTC (permalink / raw)
  To: mailing list for ConTeXt users; +Cc: Thomas A. Schmitz

And here comes question 2, a very basic one: on A4 landscape pages, I want to place two images next to each other (like the spread pages of a book). What would be the preferred way of the really competent users to do this, again keeping in mind that I want to loop over page numbers in a pdf file and thus am coding in Lua. So far, I have tried or thought about:

1. Embedded xtable

This is what I’m using now, an xtable of two columns for every A4 page. It works, but I wonder if it’s a good method.

2. combinations

This appeared to be the most natural approach (because it’s what combinations are for), but I ran into expansion problems, added a few “function () end” in my code, but couldn’t make it compile. Combinations, combined with framed and externalfigure, are difficult to write in Lua - or am I too stupid to find the winning combination (sorry for the puns).

3. columns

Again, this would seen like a natural approach, having every A4 page set up as two columns, but maybe that’s overkill? 

I’d be curious to know what you think!

All best

Thomas
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-03-28 17:06 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-03-28 13:32 Xml - lua - context Thomas A. Schmitz via ntg-context
2022-03-28 13:40 Xml - Lua " Thomas A. Schmitz via ntg-context
2022-03-28 16:21 ` Adam Reviczky via ntg-context
2022-03-28 17:06   ` Thomas A. Schmitz via ntg-context

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